DT Swiss mountain rim for road disc

Hey everybody! I am looking to build a new road/slightly off-road wheelset and I can’t find any moderately priced road-specific rims with a 25mm internal width like some of the new high end carbon wheels coming out.

Would it be possible to use a mountain rim like the DT Swiss XM 421 with a 25-28mm road tire? Or is the bead going to be too hard to put on and/or will it deal with the pressures needed?

If you look at DT's compatibility chart, they don't consider a 25mm rim and 28mm tire compatible. I don't want to speculate if you could get away with it or not. If nothing else, the tire profile it would create would make your tires more prone to sidewall cuts.

DT does make a 22.5mm version of the XM 421 which they consider just barely compatible with a 28mm tire.

If you look at DT's compatibility chart, they don't consider a 25mm rim and 28mm tire compatible. I don't want to speculate if you could get away with it or not. If nothing else, the tire profile it would create would make your tires more prone to sidewall cuts.

DT does make a 22.5mm version of the XM 421 which they consider just barely compatible with a 28mm tire.

It looks like ENVE has a pair of wheels with 25mm internals (but are also hookless) that they say can run 28-30mm road tires. I am not sure if aluminum has a harder time holding onto smaller tires when its extruded out to 25mm internals.

It looks like ENVE has a pair of wheels with 25mm internals (but are also hookless) that they say can run 28-30mm road tires. I am not sure if aluminum has a harder time holding onto smaller tires when its extruded out to 25mm internals.